Selected quad for the lemma: end_n

Word A	Word B	Word C	Word D	Occurrence	Frequency Band	MI	MI Band	Prominent
end_n	day_n	month_n	week_n	1,539	5	9.4455	5	false

Text snippets containing the quad

ID	Title	Author	Corrected Date of Publication (TCP Date of Publication)	STC	Words	Pages
A44321	Lectures and collections made by Robert Hooke.	Hooke, Robert, 1635-1703.	1678 (1678)	Wing H2618; ESTC R23972	80,779	142

I said of the nature of Baldwinus Phosphorus I shall recite an Experiment that I purposely made to examin whether the presence of the Air were necessary to the shining of this Phosphorus as I had long since found it to that of some pieces of shining wood We exposed for a competent time to the beams of a vigorous light a portion of matter of about the breadth of the palm of ones hand which we had prepared to be made luminous by them And then causing the Candles to be removed for we chose to make tryal by night we nimbly conveyed the matter into a receiver that was kept in readiness for it presuming as the event shewed we might that by using diligence the light would last as long as the experiment would need to do making hast therefore to Pump out the Air we heedfully watched whether the withdrawing of it would contrary to my conjecture notably diminish the light of the shining matter And after we had thus withdrawn the Air gradually we tryed whether by letting it return hastily it would produce a more sensible change in the matter which had been purposely put in without any thing to cover it that it might be the more exposed to the Airs Action But neither upon the gradual recess of the Air nor yet upon its rushing in when it was permitted to return could we certainly observe any manifest alteration in the luminousness of the Phosphorus other than that slow decrement that might well be imputed to the time during which the experiment was making It being well known that this luminous substance requires no long time to make it decay and by degrees to lose all its light so that though once there seemed to one or two of the by-standers upon the return of the Air to be some recovery of part of the lost splendor yet after repeated experiments it was concluded that the presence of the Air was not at all necessary to the shining of our matter and it was judged most probable that the absence or presence of the Air had no manifest operation on it I might add to this that perhaps the presence of the Air is rather hurtful than advantagious to this sort of lights since for having had a large Phosphorus that was much esteemed and whilst I kept it exactly protected from the Air did very well a part of the Glass that covered it having by mischance been somewhat crackt though none of the splinters appeared displaced yet it seems some of the Corpuscles of the Air made a shift to insinuate themselves at these chinks as narrow as they were and in not many days made the matter cease to be capable of being made luminous as before I cannot stay to inquire whether this unfitness or indisposition may be imputed to the bare moisture of the Air or to some other substance or quality that alone or in conjunction with the moisture may spoil that peculiar texture or constitution that fits the matter of the Phosphorus assisted by the impressions of external light to become luminous This I say I cannot stay to examine though That this Phosphorus is of a nice and tender constitution and easily alterable I was induced to think by finding that the want of circumstances seemingly slight enough would keep it from being made and I guess that a convention of circumstances did more contribute to the production than any peculiar and incommunicable nature of the matter Because having had the curiosity to make some trial upon so obvious a material as quick Lime though the success did not answer my designs yet neither was it so bad but that some luminous quality was produced in the Lime by the action of the fire and a saline Liquor and I scarce question but other materials will be found capable of being made luminous by the same or the like operation that is imploy'd by Baldwinus when that learned man shall think fit to communicate his way to the Publick But to return to what I was saying that the contact of the Air might be rather hurtful than advantagious to the Phosphorus I shall only add here as matter of fact for my conjectures about Light belong to my yet unpublisht Notes of the Origine of Qualities that whereas the contact of the Air though it were not free did in a few days destroy the luminousness of a good Phosphorus yet having included another in a Receiver whence we afterwards pumpt out the Air this matter though inferior to the other in vividness was so little spoiled by lying open in our Vacuum that at the end of not only some weeks but some months I found that the beams of a Candle passing to it through the Receiver would notwithstanding the Vacuum it yet continues in suffice to re-excite in it a manifest light Thus far was the communication of this excellent person who it 's hoped may be further prevailed with to communicate those other accurate observations and curious researches he hath made concerning the light of the Bononian Stone and the Phosphoros Baldwini which are indeed truly admirable and very much differing from the usual processes of Nature for the exhibiting of light Before I take leave of my Astronomical Readers I shall here acquaint them with some Collections I have made of other Astronomical matters and discoveries which I hope will not be less pleasing to them than they were at first to me The Discoveries are new and not less significant The first is A Letter from Johannes Carolus Gallet L.L.D. and Provost of the Church of St. Symphorean at Avignon directed thus CLarissimo Eruditissimoque viro D. Johanni Dominico Cassino Matheseos Professori Celeberrimo Astronomo praestantissimo Academiae Regiae scientiarum alumno meritissimo Conteining an account of his observation of Mercury passing under the Sun Mr. Gallet then acquaints Mr. Cassini with his observation of ☿ sub ☉ and the whole method and process of his observation First he fitted two excellent Telescopes the Glasses of which were given him by Mr. Jac. Borrellius one of the Academy Royal of Paris The one of twenty three foot he fitted with a Glass covered with smooke placed in the outward focus of the Eye-Glass The other of three foot he fixt to the Arm of his Quadrant of the same Radius this was so exquisite that compared with one of Divini which was chosen by the care of Honorato Fabri and procured by Monsieur de Beauchamps it was found to represent the objects clearer By this the figure of the Sun was cast on an opposite Table on which he had drawn a Circle of the bigness proper to the Distance and Magnifying of the Glasses to contain the whole Face of the Sun and by Parallel Circles had subdivided the same into digits and Sexagesimals he had also placed three threds in the interior focus of the Glasses that the middlemost went through the Center and the two outward touched the Limb of the Sun by their shadow on the